US4462112A - Speaker system - Google Patents
Speaker system Download PDFInfo
- Publication number
- US4462112A US4462112A US06/452,236 US45223682A US4462112A US 4462112 A US4462112 A US 4462112A US 45223682 A US45223682 A US 45223682A US 4462112 A US4462112 A US 4462112A
- Authority
- US
- United States
- Prior art keywords
- switch
- terminal
- loudspeaker
- loudspeakers
- voice coil
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 230000005236 sound signal Effects 0.000 claims 1
- 238000013016 damping Methods 0.000 abstract description 6
- 230000004044 response Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 abstract description 2
- 230000035945 sensitivity Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- LYKJEJVAXSGWAJ-UHFFFAOYSA-N compactone Natural products CC1(C)CCCC2(C)C1CC(=O)C3(O)CC(C)(CCC23)C=C LYKJEJVAXSGWAJ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
- H04R1/2807—Enclosures comprising vibrating or resonating arrangements
- H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
- H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only using transducers reproducing the same frequency band
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
Landscapes
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
A speaker system which comprises two speakers and a switch for selectively connecting one of the speakers to an input through a volume controller. The other of the speakers is always connected to the input, so that in response to switching action of the switch, two speakers may operate as twin-drive woofers or the former one of the speakers may operate as a passive radiator. The volume controller is used for attenuation adjustment of the twin-drive woofers and damping adjustment of the passive radiator.
Description
1. Field of the Invention
This invention is directed to an improvement of a speaker system, and more particularly to a speaker system which can be operative both as a twin-drive speaker system wherein two woofers are simultaneously driven and as a passive radiator.
2. Description of the Prior Art
There have conventionally been known the following compact speaker systems.
FIG. 1 shows a closed-type speaker system in which an enclosure containing a woofer W therein is completely closed from the outer air. Since the internal volume of the enclosure is small, the enclosure is configured in an acoustic suspension or in an air suspension.
FIG. 2 shows a bass-reflex speaker system in which a duct D is provided in the enclosure to utilize resonance of the duct D to improve reproduction of low-range sound.
FIG. 3 shows a passive radiator type speaker system in which a passive radiator P is driven by back pressure of a woofer to thereby increase low-range sound.
In the closed construction of FIG. 1, sound reproduction cannot be effected in low-range when the speaker system is a compact one with a small volume and a small diameter.
In this connection, the bass-reflex speaker system of FIG. 2, the passive radiator type speaker system of FIG. 3 or a system as shown in FIG. 4 which is of a closed type and includes two woofers are used. However if those constructions are used in speaker systems for cars, sound characteristic in low range varies depending on the shapes of cars and positions in a car room for mounting the speaker systems. For example, characteristic No. 2 obtained when the speaker system is positioned in a room without resonance and characteristic No. 1 obtained when the speaker system is mounted in a car room are different from each other as shown in FIG. 5. Although differences of the characteristic extremely vary depending on shapes of car bodies, it has been quite difficult, in the conventional speaker systems, to adjust the low-range sound characteristic for every car.
It is therefore an object of the present invention to alleviate the aforementioned drawbacks involved in the prior art, by providing a novel speaker system which includes two speakers one of which is always connected to an input and the other of which is selectively connected to the input through a volume controller by use of a switch so that in response to switching action of the switch, said two speakers may operate as twin-drive woofers or the other speaker may operate as a passive radiator. At the same time, attenuation adjustment of the twin-drive woofers or damping adjustment of the passive radiator is effected by the volume controller.
In accordance with the present invention, there is provided a speaker system which comprises:
an enclosure;
two speakers contained in said enclosure;
a switching means for applying input signals to one or both of said speakers; and
a volume controller connected between said one of the speakers and said switching means.
FIGS. 1 to 4 are front elevations illustrating conventional speaker systems, respectively;
FIG. 5 is a graph showing reproduction sensitivities and input signal frequencies of a conventional speaker system;
FIG. 6A is a front elevation showing an embodiment of the speaker system according to the present invention;
FIG. 6B is a circuit diagram of the same embodiment; and,
FIGS. 7 and 8 are graphs showing relations between reproduction sensitivities and input signal frequencies of the same embodiment.
The present invention will now be described in detail by way of a preferred embodiment referring to the drawings.
As shown in FIG. 6A, the speaker system comprises two woofers A and B both contained in an enclosure E, a switch 1 and a volume controller 2. An input terminal [+] is connected to first terminal T1 of the woofer A as shown in FIG. 6B. Second terminal T2 of the woofer A as well as second terminal T'2 of the woofer B is connected another input terminal [-]. The input terminal [+] is connected to one of movable terminals V1 of the volume controller 2 through the switch 1 while first terminal T'1 of the woofer B is connected to the outer movable terminal V2 of the volume controller 2.
In FIG. 6B, when the switch 1 is positioned in A, input signal is applied to the woofers A and B, so that the speaker system operates as a twin-drive woofer system. At that time, input signal level (attenuation) can be adjusted by the volume controller 2.
FIG. 7 shows characteristics of reproduction sensitivities (dB) and input signal frequencies (Hz) when the speaker system is in the above-mentioned state. In this graph, the line (1) corresponds to maximum volume, the line (2) to minimum volume, and the line (3) to intermediate volume between (1) and (2), respectively. In this case, the volume controller 2 operates as an attenuator of the woofer B, whereby the woofer B reproduces sound up to an intermediate level.
Next, when the switch 1 is positioned in B, the woofer B is not applied with input signal and it is driven only by back pressure of the woofer A. Therefore, the woofer B operates as a passive radiator. At that time, since reverse electromotive current which generates within a voice coil (not shown) flows to the volume controller 2, it is possible to apply electromagnetic damping to the woofer B by adjusting the volume controller 2. The damping force may be controlled by the volume controller 2.
FIG. 8 shows reproduction characteristics of reproduction sensitivities (dB) and reproduction frequencies (Hz). The line (1) corresponds to the maximum volume, the line (2) to the minimum volume, and the line (3) to an intermediate volume between (1) and (2), respectively. The volume cntroller 2 operates as a damping adjuster of the woofer which then functions as a passive radiator to thereby obtain a characteristic with sound pressure level rising near the resonance frequency of the woofer B.
As described in the above, the speaker system according to the present invention enables to vary frequency response in low range. Therefore, the speaker system may meet with various environments of car rooms, various musics or various tone qualities of amplifiers of tape decks. Further, since a normal speaker unit is used as a passive radiator and damping of the passive radiator is adjusted by use of a resistor connected to a voice coil terminal of the speaker, parts for twin-drive woofers may be used. This leads to cost reduction for manufacturing speaker systems.
Claims (3)
1. A loudspeaker system comprising: a speaker box having first and second apertures in the wall means thereof; first and second loudspeakers mounted in said first and second apertures, respectively, so that the diaphragm of each of said loudspeakers faces outwardly of said speaker box through its associated aperture, said loudspeakers each having first and second voice coil terminals; first and second system input terminals provided on said box and adapted to be connected to an audio signal source; a switch having a switch input terminal connected to said first system input terminal, said switch having a switch output terminal and means for selectively connecting said switch input terminal to said switch output terminal and disconnecting it therefrom; a volume controller connected to said switch output terminal and said first and second voice coil terminal of said second loudspeaker; said first voice coil terminal of said first loudspeaker being directly connected to said first system input terminal, said second voice coil terminals of said first and second loudspeakers being connected together and to said second system input terminal.
2. A loudspeaker system according to claim 1 in which said volume controller comprises adjustable electrical resistance means having two movable terminals, one of said movable terminals of said volume controller being connected to said switch output terminal and the other of said movable terminals being connected to said first voice coil terminal of said second loudspeaker.
3. A loudspeaker system according to claim 1 in which said speaker box has a front wall and said first and second apertures are provided in said front wall in side-by-side relation, said first and second loudspeakers being woofers which are mounted in said first and second apertures, respectively.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1981193843U JPS5899991U (en) | 1981-12-25 | 1981-12-25 | speaker system |
JP56-193843[U] | 1981-12-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4462112A true US4462112A (en) | 1984-07-24 |
Family
ID=16314659
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/452,236 Expired - Fee Related US4462112A (en) | 1981-12-25 | 1982-12-22 | Speaker system |
Country Status (3)
Country | Link |
---|---|
US (1) | US4462112A (en) |
JP (1) | JPS5899991U (en) |
DE (1) | DE3247844A1 (en) |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4682364A (en) * | 1984-07-21 | 1987-07-21 | U.S. Philips Corporation | Fader circuit arrangement in electrical reproducing apparatus and fader control for such an arrangement |
US4741040A (en) * | 1985-06-14 | 1988-04-26 | U.S. Philips Corporation | Bass-reflex loudspeaker system |
US5097514A (en) * | 1988-05-25 | 1992-03-17 | Mcneill Dennis G | Equilateral tetrahedral speaker system |
US5122720A (en) * | 1989-12-01 | 1992-06-16 | Martinsound Technologies, Inc. | Automated fader system |
GB2344016A (en) * | 1998-11-23 | 2000-05-24 | Ask Ind Spa | An ABR loudspeaker using body panels to form a closed air box within a motor vehicle |
US7088827B1 (en) * | 1999-12-09 | 2006-08-08 | Broan-Nutone Llc | Reconfigurable speaker system |
US20100202619A1 (en) * | 2007-07-26 | 2010-08-12 | Nexo | Sound reproduction system comprising a loudspeaker enclosure with ports, and associated processing circuit |
US20190215606A1 (en) * | 2018-01-05 | 2019-07-11 | Hyundai Motor Company | Vehicle and method for controlling the same |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2501948Y2 (en) * | 1985-09-02 | 1996-06-19 | パイオニア株式会社 | In-vehicle audio system |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3275758A (en) * | 1962-09-27 | 1966-09-27 | Walter B Udell | Sound reproducing apparatus |
-
1981
- 1981-12-25 JP JP1981193843U patent/JPS5899991U/en active Pending
-
1982
- 1982-12-22 US US06/452,236 patent/US4462112A/en not_active Expired - Fee Related
- 1982-12-23 DE DE19823247844 patent/DE3247844A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3275758A (en) * | 1962-09-27 | 1966-09-27 | Walter B Udell | Sound reproducing apparatus |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4682364A (en) * | 1984-07-21 | 1987-07-21 | U.S. Philips Corporation | Fader circuit arrangement in electrical reproducing apparatus and fader control for such an arrangement |
US4741040A (en) * | 1985-06-14 | 1988-04-26 | U.S. Philips Corporation | Bass-reflex loudspeaker system |
US5097514A (en) * | 1988-05-25 | 1992-03-17 | Mcneill Dennis G | Equilateral tetrahedral speaker system |
US5122720A (en) * | 1989-12-01 | 1992-06-16 | Martinsound Technologies, Inc. | Automated fader system |
US5293102A (en) * | 1989-12-01 | 1994-03-08 | Martinsound Technologies, Inc. | Automated fader system |
GB2344016A (en) * | 1998-11-23 | 2000-05-24 | Ask Ind Spa | An ABR loudspeaker using body panels to form a closed air box within a motor vehicle |
GB2344016B (en) * | 1998-11-23 | 2003-02-26 | Ask Ind Spa | Passive elements in closed volume for loudspeakers |
US7088827B1 (en) * | 1999-12-09 | 2006-08-08 | Broan-Nutone Llc | Reconfigurable speaker system |
US20100202619A1 (en) * | 2007-07-26 | 2010-08-12 | Nexo | Sound reproduction system comprising a loudspeaker enclosure with ports, and associated processing circuit |
US8391510B2 (en) * | 2007-07-26 | 2013-03-05 | Nexo | Sound reproduction system comprising a loudspeaker enclosure with ports, and associated processing circuit |
US20190215606A1 (en) * | 2018-01-05 | 2019-07-11 | Hyundai Motor Company | Vehicle and method for controlling the same |
Also Published As
Publication number | Publication date |
---|---|
JPS5899991U (en) | 1983-07-07 |
DE3247844A1 (en) | 1983-07-21 |
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Legal Events
Date | Code | Title | Description |
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AS | Assignment |
Owner name: CLARION CO. LTD., 35-2, HAKUSAN 5-CHOME, BUNKYO-KU Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WATANABE, TATHUYA;REEL/FRAME:004080/0538 Effective date: 19821201 |
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FPAY | Fee payment |
Year of fee payment: 4 |
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REMI | Maintenance fee reminder mailed | ||
LAPS | Lapse for failure to pay maintenance fees | ||
FP | Expired due to failure to pay maintenance fee |
Effective date: 19920726 |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |